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Stainless Steel 316/316L Round Bar is an austenitic stainless steel known for its superior corrosion resistance, strength, and durability. It contains molybdenum, which enhances its resistance to pitting and crevice corrosion in chloride-rich environments. The “L” grade indicates low carbon content, which minimizes carbide precipitation during welding and improves intergranular corrosion resistance. Stainless Steel 316/316L Round Bar performs exceptionally well in marine, chemical, and food processing industries. Its excellent formability and toughness make it one of the most widely used stainless steel grades.
The chemical composition of Stainless Steel 316/316L Round Bar includes chromium, nickel, and molybdenum, providing enhanced corrosion and oxidation resistance compared to 304 stainless steel. The addition of molybdenum significantly increases its performance in acidic and saline conditions. Stainless Steel 316/316L Round Bar resists corrosion from sulfuric, hydrochloric, acetic, and formic acids. Its low carbon version (316L) ensures superior weldability and eliminates the risk of sensitization. This combination of strength and corrosion resistance makes it ideal for harsh industrial environments.
Stainless Steel 316/316L Round Bar exhibits excellent mechanical properties, including high tensile and yield strength, even at elevated temperatures. It maintains its structural integrity and surface finish under continuous exposure to heat and corrosive media. The alloy offers outstanding resistance to atmospheric corrosion and oxidation. Stainless Steel 316/316L Round Bar is non-magnetic in the annealed condition and has excellent formability and machinability. These characteristics make it a preferred material for components that require both strength and corrosion resistance.
One of the notable advantages of Stainless Steel 316/316L Round Bar is its outstanding resistance to chlorides and seawater environments. This makes it particularly suitable for marine and coastal applications, as well as in chemical processing equipment. The alloy also performs efficiently in high-moisture and salt-laden environments. Stainless Steel 316/316L Round Bar resists rusting, pitting, and cracking under aggressive exposure. Its versatility allows it to be used in both structural and decorative applications across multiple industries.
Stainless Steel 316/316L Round Bar is easy to fabricate, weld, and machine using standard industrial techniques. The low carbon content in 316L helps prevent carbide precipitation during welding, reducing the need for post-weld annealing. The material can also be cold- or hot-worked to achieve desired mechanical properties. Stainless Steel 316/316L Round Bar offers a smooth, polished surface finish, making it suitable for sanitary and hygienic applications. It is widely used in pharmaceutical, food, and medical equipment due to its non-reactive properties.
Applications of Stainless Steel 316/316L Round Bar include heat exchangers, marine fittings, pressure vessels, pumps, valves, and industrial piping systems. It is also used in petrochemical, power generation, and architectural projects requiring long-term durability. The alloy’s resistance to chloride-induced corrosion ensures performance in saltwater and chemical processing environments. Stainless Steel 316/316L Round Bar provides excellent longevity, reducing maintenance costs and downtime. Its reliability under mechanical and thermal stress makes it a valuable material for modern engineering solutions.
In conclusion, Stainless Steel 316/316L Round Bar offers a perfect balance of strength, corrosion resistance, and versatility. Its molybdenum-enhanced composition ensures superior resistance to chlorides and acidic environments. Stainless Steel 316/316L Round Bar delivers long-lasting performance, easy weldability, and excellent formability, making it suitable for a wide range of industrial applications. Its combination of durability and aesthetic appeal adds to its global demand. Overall, it remains a top choice for industries requiring high-performance and corrosion-resistant stainless steel.
Specification Table
| Specification | SS 316 | SS 316L |
|---|---|---|
| Grade Type | Austenitic Stainless Steel | Austenitic Stainless Steel |
| Density | 8.0 g/cm³ | 8.0 g/cm³ |
| Melting Point | 1375–1400°C | 1375–1400°C |
| Corrosion Resistance | Excellent against chlorides and acids | Excellent against chlorides and acids |
| Applications | Marine, chemical, pharmaceutical, food processing | Marine, chemical, pharmaceutical, food processing |
| Fabrication | Weldable, machinable, formable | Weldable, machinable, formable |
| Standard Specifications | ASTM A276 / A479 | ASTM A276 / A479 |
Chemical Composition (Typical ranges for SS316/316L)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | SS 316 (%) | SS 316L (%) |
|---|---|---|
| Carbon (C) | 0.08 max | 0.03 max |
| Chromium (Cr) | 16.0–18.0 | 16.0–18.0 |
| Nickel (Ni) | 10.0–14.0 | 10.0–14.0 |
| Molybdenum (Mo) | 2.0–3.0 | 2.0–3.0 |
| Manganese (Mn) | 2.0 max | 2.0 max |
| Silicon (Si) | 1.0 max | 1.0 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulfur (S) | 0.03 max | 0.03 max |
| Iron (Fe) | Balance | Balance |
Mechanical Properties (Typical)
| Property | SS 316 | SS 316L |
|---|---|---|
| Tensile Strength (MPa) | 515–720 | 485–690 |
| Yield Strength (0.2% Proof, MPa) | 205–290 | 170–280 |
| Elongation (%) | 40 min | 40 min |
| Hardness (Brinell, HB) | 217 max | 217 max |
| Modulus of Elasticity (GPa) | 193 | 193 |
| Density (g/cm³) | 8.0 | 8.0 |
| Impact Strength (Charpy V-notch, J) | 75 min | 75 min |
Equivalent Grades
| Standard | SS 316 | SS 316L |
|---|---|---|
| ASTM / ASME | A276 / A479 | A276 / A479 |
| EN (European Standard) | 1.4401 | 1.4404 |
| JIS (Japanese Standard) | SUS 316 | SUS 316L |
| DIN (German Standard) | X5CrNiMo17-12-2 | X2CrNiMo17-12-2 |
| GB / Chinese Standard | 0Cr17Ni12Mo2 | 00Cr17Ni14Mo2 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Diameter (mm) | Diameter (inch) | Weight per Meter (kg/m) |
|---|---|---|
| 6 | 1/4" | 0.22 |
| 8 | 5/16" | 0.39 |
| 10 | 3/8" | 0.61 |
| 12 | 1/2" | 0.89 |
| 16 | 5/8" | 1.58 |
| 20 | 3/4" | 2.47 |
| 25 | 1" | 3.85 |
| 30 | 1 1/4" | 5.55 |
| 40 | 1 1/2" | 8.64 |
| 50 | 2" | 13.21 |
| 60 | 2 1/2" | 18.86 |
| 80 | 3" | 33.19 |
| 100 | 4" | 51.84 |
Types Of 316/316L Round Bars and Tubes
Stainless Steel Round Bar
Monel 400 K400 Round Bar
Hastelloy Round Bar
Inconel 600 Round Bar
Nickel Alloy Round Bar
Super Duplex Round Bar
Monel K500 Round Bar
Inconel 625 Round Bar
Frequently Asked Questions (FAQ)
What is Stainless Steel 316/316L?
Stainless Steel 316 is an austenitic stainless steel alloy with excellent corrosion resistance, especially against chlorides and marine environments. SS 316L is the low-carbon version, offering better weldability and reduced carbide precipitation.
What are the main differences between SS 316 and SS 316L?
The main difference is the carbon content: SS 316 has up to 0.08% carbon, while SS 316L has a maximum of 0.03% carbon. Lower carbon improves weldability and reduces the risk of intergranular corrosion.
Where is SS 316/316L commonly used?
It is widely used in chemical processing, marine equipment, pharmaceutical industries, food processing, and high-temperature applications due to its superior corrosion resistance and durability.
Is SS 316/316L suitable for welding?
Yes. SS 316 can be welded, but SS 316L is preferred for welding due to its low carbon content, which prevents carbide precipitation and reduces the risk of intergranular corrosion.
What standards apply to SS 316/316L Round & Bar?
Common standards include ASTM A276, ASTM A479, EN 1.4401 / 1.4404, JIS SUS 316 / 316L, and DIN X5CrNiMo17-12-2 / X2CrNiMo17-12-2.
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